Le sette sorelle

Standard Oil of New Jersey (poi Exxon, ora ExxonMobil)
Royal Dutch Shell
British Anglo-Persian Oil Company. (poi British Petroleum, BP)
Standard Oil of New York. (poi Mobil, ora ExxonMobil)
Texaco (poi Chevron ora ChevronTexaco)
Standard Oil of California (Socal, ora ChevronTexaco)
Gulf Oil (ora Chevron)